<template>
	<div>
		<!-- 面包屑导航 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
		  <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
		  <el-breadcrumb-item>商品管理</el-breadcrumb-item>
		  <el-breadcrumb-item>参数列表</el-breadcrumb-item>
		  
		</el-breadcrumb>
		<!-- 卡片视图 -->
		<el-card>
			<!-- 头部警告区域 -->
			  <el-alert title="注意:只允许使用第三级分类设置相关参数" type="warning" :closable="false"  show-icon>
	        </el-alert>
		<!-- 选择商品分类区域 -->
		<el-row class="cat_opt">
			<el-col>
				<span>选择商品分类:</span>
				<!-- 选择商品分类的级联选择框 -->
				 <el-cascader
				    v-model="selectedCateKeys"
				    :options="cateList"
				    :props="cateProps"
				    @change="handleChange"></el-cascader>
			</el-col>
		</el-row>
		<!-- tabs -->
		<el-tabs v-model="activeName" @tab-click="handleClick">
			<!-- //添加参数 -->
		    <el-tab-pane label="动态参数" name="many" class="Pane">
					<!-- 添加参数的按钮 -->
					<el-button type="primary" size="mini" :disabled="isBtnDisable" @click="AddDialogVisible=true">添加参数</el-button>
					<!-- //动态参数表格 -->
					<el-table :data="manyTableData" border stripe>
						<!-- 展开行 -->
						<el-table-column type="expand" label="#">
							<template v-slot="scope">
								<!-- 循环渲染tag标签 -->
								<el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i,scope.row)">
									{{item}}
								</el-tag>
								<el-input
								  class="input-new-tag"
								  v-if="scope.row.inputVisible"
								  v-model="scope.row.inputValue"
								  ref="saveTagInput"
								  size="small"
								  @keyup.enter.native="handleInputConfirm(scope.row)"
								  @blur="handleInputConfirm(scope.row)"
								>
								<!-- 输入文本框 -->
								</el-input>
								<!-- 添加按钮 -->
								<el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
								
							</template>
						</el-table-column>
						<!-- 索引列 -->
						<el-table-column type="index" label="#"></el-table-column>
						<el-table-column label="参数名称" prop="attr_name"></el-table-column>
						<el-table-column label="操作">
							<template v-slot="scope">
								<el-button size="mini" type="primary" icon="el-icon-search" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
								<el-button size="mini" type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
							</template>
						</el-table-column>
					</el-table>
				</el-tab-pane>
		    <el-tab-pane label="静态参数" name="only" class="Pane">
					<el-button type="primary" size="mini" :disabled="isBtnDisable" @click="AddDialogVisible=true">添加属性</el-button>
					<el-table :data="onlyTableData" border stripe>
						<!-- 展开行 -->
						<el-table-column type="expand" label="#">
							<template v-slot="scope">
								<!-- 循环渲染tag标签 -->
								<el-tag v-for="(item,i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i,scope.row)">
									{{item}}
								</el-tag>
								<el-input
								  class="input-new-tag"
								  v-if="scope.row.inputVisible"
								  v-model="scope.row.inputValue"
								  ref="saveTagInput"
								  size="small"
								  @keyup.enter.native="handleInputConfirm(scope.row)"
								  @blur="handleInputConfirm(scope.row)"
								>
								<!-- 输入文本框 -->
								</el-input>
								<!-- 添加按钮 -->
								<el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">+ New Tag</el-button>
								
							</template>
						</el-table-column>
						<!-- 索引列 -->
						<el-table-column type="index" label="#"></el-table-column>
						<el-table-column label="属性名称" prop="attr_name"></el-table-column>
						<el-table-column label="操作">
							<template v-slot="scope">
								<el-button size="mini" type="primary" icon="el-icon-search" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
								<el-button size="mini" type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
							</template>
						</el-table-column>
					</el-table>
				</el-tab-pane>
		    
		  </el-tabs>
			
			
		</el-card>
		<!-- 添加参数的对话框 -->
		<el-dialog
		  :title="'添加'+titleText"
		  :visible.sync="AddDialogVisible"
		  width="50%" @close="addDialogClosed">
			<el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" >
			  <el-form-item :label="titleText" prop="attr_name">
			    <el-input v-model="addForm.attr_name"></el-input>
			  </el-form-item>
			</el-form>
		  <span slot="footer" class="dialog-footer">
		    <el-button @click="AddDialogVisible = false">取 消</el-button>
		    <el-button type="primary" @click="addparams">确 定</el-button>
		  </span>
		</el-dialog>
		<!-- 修改对话框 -->
		<el-dialog
		  :title="'修改'+titleText"
		  :visible.sync="editDialogVisible"
		  width="50%" @close="editDialogClosed">
			<el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px" >
			  <el-form-item :label="titleText" prop="attr_name">
			    <el-input v-model="editForm.attr_name"></el-input>
			  </el-form-item>
			</el-form>
		  <span slot="footer" class="dialog-footer">
		    <el-button @click="editDialogVisible = false">取 消</el-button>
		    <el-button type="primary" @click="editparams">确 定</el-button>
		  </span>
		</el-dialog>
	</div>
</template>

<script>
	export default{
		data(){
			return{
				// 控制按钮与文本框切换
				inputVisible:false,
				inputValue:'',
				//商品分类列表
				cateList:[],
				//级联选择框的配置对象
				cateProps:{expandTrigger: 'hover',value:'cat_id',label:'cat_name',children:'children'},
				//级联选择框双向绑定到的数组
				selectedCateKeys:[],
				//被激活的页签名称
				activeName:'many',
				manyTableData:[],
				onlyTableData:[],
				AddDialogVisible:false,
				attr_name1:[],
				addForm:{
					attr_name:""
				},
				addFormRules:{
					attr_name:[{required:true,message:"请输入参数名称",tigger:'blur'}]
				},
				editDialogVisible:false,
				//修改的表单数据对象
				editForm:{
					attr_name:""
				},
				//修改表单的验证对象
				editFormRules:{
					attr_name:[{required:true,message:"请输入参数名称",tigger:'blur'}]
				},
			}
		},
		created() {
			this.getCateList()
		},
		computed:{
			//如果按钮需要被禁用 返回true
			isBtnDisable(){
				if(this.selectedCateKeys.length!==3) return true
				return false
			},
			//当前选中的三级分类的ID
			cateId(){
				if(this.selectedCateKeys.length===3) return this.selectedCateKeys[2]
				return null
			},
			titleText(){
				//动态计算属性
			return	this.activeName==="many"?  '动态参数' : '静态属性'
			}
		},
		methods:{
			//删除对应的参数
			handleClose(i,row){
				row.attr_vals.splice(i,1)
				this.saveAttrVals(row)
			},
			//点击按钮展示文本输入框
			showInput(row){
				//这个时候页面还没有被渲染 所以直接掉的话会拿不到focus
				row.inputVisible=true
				//让文本框自动获得焦点
				//$nextTick方法 当页面上的元素被重新渲染之后才会执行回掉函数代码
				   this.$nextTick(_ => {
				          this.$refs.saveTagInput.$refs.input.focus();
				        });
				},
			//文本框失去焦点或者按下ENTER键会触发
		async	handleInputConfirm(row){
				// trim()去空格
				if(row.inputValue.trim().length===0){
					row.inputValue=''
					row.inputVisible=false
					return
				}
				row.attr_vals.push(row.inputValue.trim())
				row.inputValue=''
				row.inputVisible=false
				// 将操作保存到数据库中
			this.saveAttrVals(row)
			},
			//将对attr_vals的操作保存到数据库
			async saveAttrVals(row){
				const {data:res}=await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,
					{attr_name:row.attr_name,attr_sel:row.attr_sel,attr_vals:row.attr_vals.join(' ')})
					if(res.meta.status!==200) return this.$message.error('修改失败')
					this.$message.success('修改成功')
			},
			async removeParams(attr_id){
		const confirmResult=	await	this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
				          confirmButtonText: '确定',
				          cancelButtonText: '取消',
				          type: 'warning'
				        }).catch(err=>err)
								//用户取消删除操作
								if(confirmResult!=='confirm') return this.$message.info('以取消删除')
				console.log(this.cateId)
				 this.$http.delete(`categories/${this.cateId}/attributes/${attr_id}`).then(res=>{
					if(res.data.meta.status!==200) return this.$message.error('删除失败')
					this.$message.success('删除成功')
					this.getParamsData()
				})
			},
			//点击修改
			editparams(){
				this.$refs.editFormRef.validate(valid=>{
					if(!valid) return
					if(this.attr_name1.filter(item=>{return item===this.editForm.attr_name}).length!==0) return this.$message.error('已经存在')
				this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,{attr_name:this.editForm.attr_name,
					attr_sel:this.activeName}).then(res=>{
						if(res.data.meta.status!==200) return this.$message.info("修改参数失败")
						this.$message.success('修改成功')
						this.getParamsData()
						this.editDialogVisible=false
					})
				})
    },				
			editDialogClosed(){
				this.$refs.editFormRef.resetFields()
			},
		async	showEditDialog(attr_id){
				//查询当前参数的信息
				console.log(attr_id)
		const {data:res}=	await	this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`,{params:{attr_sel:this.activeName}})
		if(res.meta.status!==200) return this.$message.info('获取当前参数信息失败');
		this.editForm=res.data
				this.editDialogVisible=true
			},
			//点击按钮添加参数
		addparams(){
				this.$refs.addFormRef.validate(valid=>{
					if(!valid) return 
					this.attr_name1.push(this.addForm.attr_name)
			this.$http.post(`categories/${this.cateId}/attributes`,{attr_name:this.addForm.attr_name,attr_sel:this.activeName}).then(res=>{
				if(res.data.meta.status!==201) return this.$message.info('添加失败')
				this.$message.success('添加成功')
				this.getParamsData()
				this.AddDialogVisible=false
			})
				})
			},
		async	getCateList(){
			const {data:res}=	await	this.$http.get('categories')
			console.log(res)
			if(res.meta.status!==200) return this.$message.error('获取商品分类失败');
			this.cateList=res.data
			console.log(this.cateList)
			},
			//级联选择框选择项变化是调用
			handleChange(){
				if(this.selectedCateKeys.length!==3) {
					this.selectedCateKeys=[]
					this.manyTableData=[]
					this.onlyTableData=[]
					return this.$message.error('请选择三级分类')
					}
				console.log(this.selectedCateKeys)
				
		this.getParamsData()
		},
		//获取参数的列表数据
	async	getParamsData(){
		// if(this.selectedCateKeys.length!==3){
		// 	this.selectedCateKeys=[]
			
		// }
			//根据所选分类的id和当前的面板获取对应的参数
			const {data:res}=	await	this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:this.activeName}})
			console.log(res)
			if(res.meta.status!==200) return this.$message.info('获取分类数据失败')
			console.log(res.data)	
			res.data.forEach(item=>{
			item.attr_vals=item.attr_vals?
			item.attr_vals.split(' '):[],
			// 控制文本框的显示与隐藏
			item.inputVisible=false
			//文本框中输入的值
			item.inputValue=''
			})
			
				if(this.activeName==='many'){
					this.manyTableData=res.data
					console.log(this.manyTableData)
				}else{
					this.onlyTableData=res.data
					console.log(this.onlyTableData)
				}
		},
		handleClick(){
			this.getParamsData()
		},
		//监听添加对话框的关闭事件
		addDialogClosed(){
			this.$refs.addFormRef.resetFields()
		}
	},
	}
</script>

<style scoped="scoped" lang="less">
	.cat_opt{
		margin: 15px 0;
		font-size: 18px;
		text-align: left;
		
	}
	.Pane{
		text-align: left;
	}
	.el-tag{
		margin: 10px;
	}
	.el-input{
		width: 150px;
	}
</style>
